800318621 has 8 divisors (see below), whose sum is σ = 822995640. Its totient is φ = 777696768.

The previous prime is 800318581. The next prime is 800318641. The reversal of 800318621 is 126813008.

It can be written as a sum of positive squares in 4 ways, for example, as 510127396 + 290191225 = 22586^2 + 17035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800318621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800318641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16565 + ... + 43301.

It is an arithmetic number, because the mean of its divisors is an integer number (102874455).

Almost surely, 2^800318621 is an apocalyptic number.

It is an amenable number.

800318621 is a deficient number, since it is larger than the sum of its proper divisors (22677019).

800318621 is a wasteful number, since it uses less digits than its factorization.

800318621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27583.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 800318621 is about 28289.9031634963. The cubic root of 800318621 is about 928.4409926710.

The spelling of 800318621 in words is "eight hundred million, three hundred eighteen thousand, six hundred twenty-one".